Sole chamfering machine



June26, 1945. w. L. MGOKENZIE I SOLE CHAMP-BRING MACHINE Fil ed Dec.

18, 1942 2 Sheets-Sheet l June 26, 1945. w, MacKENZlE SOLE CHAMFERING MACHINE Filed Dec. 18, 1942 2 Sheets-Sheet 2 Patented June 26, 1945 a s 2,378,940 UNITED TES PATENT OFFICE 2,378,940 s'o CHAMFERING MACHINE Wilbur Lt MacKenzie, Beverly, Mass.,;assignor to United Shoe Machinery Corporation, Fleming ton; NJ, a corporation of New Jersey Application pete ber is, 1942,8ei1ia1No;469-,39 7 claims; (01. 699-13) 1 This invention relates to inachines for cement ing and chamfering soles which; are to be at.- tached to shoes by means of cement. Theconstruction herein disclosed is an improvement upon an arrangement for accomplishing blade is clamped with the greater portion ofthe edge on the: knife up to the holddown protected by the clamping means. comes dull nitz clamp sufiiciently to-permitthe knife to be drawn When such a knife be asimilar I out; thereby to bring. a sharp edge into position result, which forms the subject-matterofLetters for chamferingr Whenever the outwardly-ex- Patent of the United States No. 2,266,127, granted tending used portion: becomes long enough: to be December 16-, 1941, upon the application of inconvenient; it maybe broken oii, I Walter W. Prue. I I i Other difiiculties are encountered with a class When soles are prepared for attachment to 1 of soles which are intended for usewith- Cubanshoes by means of cement, the margin of thefle sh heels and in which the heel-seatportion has been surface is roughed and a band: of cement is ajap I prefitted prior to the cementing of the sole As plied to this roughed surface extending. around a consequence ofthisheel-seat fitting'operation: the margin of the forepart of the;sole. The shouldered portions are provided at each end of roughing operation, however, tends to produce the heel-breast; line and the heel-seat portion it-t unevenedge portion by reason of the outwardly sel-f is so: radicallyredueed that the: edge of the extending fibers of the leather, especially when sole is thin and flexib'le If the knife is per the cheaper grades of stock, which are particu mitted to ridetalong such. a thinedge, it will larly loose-fibered, are employed. I n I catch in the leather and may create a fold ahead h n i y appe rance, which wouldt be 2- of the knife which, when it reaches the shou-1der visible in the. completed shoe, is also frequently; of the heel-breast line will; prevent a continued accentuated by particles of dried cement accumu automatic feeding of the sole and will robably latin upon these fibers. It therefore been throw thesole outtofthemaohijne. This diflici zlty; the customto chamfer the corner of the attachis avoided in accordance with another feature of ing surface of the roughed sole, thusrequirine the invention by arranging the machine forsep threeseparate operations prior to the introduce arate-vheightwise movements of the holddown and tion of. the combined chamfering and cementing the knife when chamfering around the heel seat machine of the Prue patent. Thi machine, by. and also for up-and-down movement together as combinin two or the operations c nst u d a theforepartoi the sole is thin orthick, To this notable improvement and has been suo essf illy m5 and; a separate stop is provided to limit down 3 emp oyed for simultaneously cementing and o ward, movement of the pivoted khifecarrier so chamfering. I t I t 1 I I that'theknife may not cut the marginof the ,However, in the use of such ma hiDestG iE U Y reducedheel-seatportiom 1 'has been experienced unde ce t in conditions I These and other features of the inventionjwill because of the summing between the gaeejm i r 0, best be understood from a consideration of the ber and the closely positioned sham-forms a d following specification taken. in connection with holddown devices; the latter of Whi h re ulates; the. accompanying drawings, in which a and renders uniform the depth of the out, if if- 1 t Fig 1 is a side elevation of a part of my imthermore, this machine, like all machines which proved cementing and chamfering machine, utilize a drag-knife, required a frequen sharpen: 4O taken from the leaving or rear side; 3 I

ing of the knife and, sometimes, inexperienced s 2 is a. plan view of the ole-supporting de-; operatorsinadvertently replaced theknife in the vices and" the associated chainfering mechanism machine in a wrong relation to the associated and has the position of the overlying work-com rt a t If tacting end of the nozzle and of. the upper feed According1y,the objector. the invention isto 4 roll indicated iri broke lines; s s s s s provide an improved machine for cementingand I Fig. 3 is a detailed View, taken onth'e section chamfering in which these difiiculties are largely Iine Ii ni ig. 4 through: the knife earner overcome and in which a more rugged construe and the knifehlade; I U I tion is provided. One feature of the invention Fig. 41s a ide elev tion-or. the hamrenn and resides in independently pivoted knife and hold holddown devices as viewed from the leaving side; down carriers with the chamfering action of the Fig, 5 isa traementary elevation of the feed knife normally controlled by the holddown. rolls dQ P i Qd e t j t I a "The problem of maintaining a sharp edgefbr Fig. 6 is an angular view on a larger scale, of the knifehas been solvedin t i r t 1? he sedb Y struction and in accordance with a feature of v ig- 7 s an ang lar yi oi apo fii qii a sole t e invention y making weenie nte I hee ha hesseaw e e s s of a. long narrow strip of uniform cross section, ing. Elis a h q f @9 9? w pvmf one edg of which sharpened before the knife is VIII of E1554 but one larger scale andw th the inserted intheinachin'e, li'esbeside the holddown I sole-engaging parts in the pos tion w i tobtvallnst and than providing a hold er tin whichthis knife When the heel end of a sole having a prefittedw heel seat is passing the knife which is their on is only necessary to release the clamped from the holddown and at that point is not operating on the sole;

Fig. 9.

The invention is illustrated as embodied in a machine of the type shown in Letters Patent of I the United States No. 2,073,647, granted March 16, 1937, upon the application of C. A. Newhall. That machine is provided with a tapered upper feed roll I having a cylindrical portion H (Fig. 5) and with a lower feed roll I 2, which rolls grip the margin of a sole S. The rolls, being mounted upon driven shaft contained within arm-like upper and lower supports I'4and I6, move the sole progressively forward to present its margin to the operating tools. The lower supportIB is pivoted at I8 in the machine and may be raised to carry the lower roll I2 into contact with the work by a treadle mechanism not herein shown. On the upper arm I4 is a pivoted carrier 20 for a nozzle 22 to which cement is supplied by way of a pipe 24. The particular nozzle herein illustrated is that covered in my application Serial No,

371,948, filed December 27, 1940, and comprises a series of slidably mounted plateszfi each of which has at its lower end an outlet opening and is spring-pressed toward the work. The position of these outlet openings with respect to adjacent parts of the machine i indicatedin dotted lines at 28 in Fig. 2, and asupport comprising superposed plates 30 attached to the pivoted arm 2! provides for adjustment of this nozzle around the forward corner thereof which the movin sole is leaving and which is adjacent to the periphery of the sole to produce a band B of cement of uniform width. A stop screw 32 (Figql) limits the downward movement of the nozzle but permits it to be lifted in case of jamming of the work.

As the sole passes beneath the nozzle, it is supported upon the fingers 34 and 36 of a bifurcated roll-supporting arm I6, as indicated by the dotted lines I6 in Figs. 1 and 2, and the bracket is secured to that arm by screws I8; It is of such a design that the bearing surfaces of the carriers are well removed from the cement nozzle and are not likely to becom gummed thereby.

The holddown carrier 64 has an elongatedhub portion 80 surrounding the pin 68 and contacting the arm 10, and the holddown is drawn down wardly with respect to that hub by means of a spring 82 extending between a depending leg 84 (Fig. 4) on the carrier and a threaded rod 8B (Fig. 1) adjustably secured bya thumb nut'88 in a depending arm 90 (Figs. ,1 and 2) formed on the bracket I4. The downward movement 0f the holddown to its idle position is adjustably limited by a. stop screw 92 threaded in the bracket I4 and held in adjusted position by a check nut 94. This screw 92 engages the depending le 84. Theleft end (Fig. 2) of the hub 80 of the holddown carrier ha a reduced portion 96 extending intoconplate 38 (Fig. 2) adjustably attached by a screw 40 to a depending bracket which is attached by a screw 42 to the lower roll-carrying arm I6. This plate 38 has a notch M to give room for tools to b described. Another work-supporting roll 44 and a table 46 are mounted on an arm 48 (Figs. 1

and 5) pivoted to the arm I5 and held up by a and providing a contact point 54, and by another gage having a contact point 56 (Fig. 2), this being the forward upright edge 58 on. a holddown member 60 (Fig. 6). tion between the path determined by the gage points 54 and 56 and the direction of movement imparted by the feed wheels, a cross feed is set up which holds the sole in the machine and renders its feeding substantially automatic. Any tendency of the extreme margin of the sole to curl up, because of the lateral pressure set up by the cross feed, is counteracted by downward pressure of the cylindrical portion II of the upper feed roll I0 against the upper peripheral corner as it is moved forward by As a result of this angular rela- :the knife 62. A

blown away from the band B of freshly appliedcement by air forced through a nozzle 63' (Fig. l) The spacing between the knife and the holddown lip Iflfiis somewhat critical for best opera- .tion because, with different qualities of leather" justment of to the hub so that the cutting edge Hi4 (Figs. 3

and 4) can be brought into the desired relation to the holddown 60 with its overhanging lip I06 which rests upon the upper surface of the sole and acts both to hold it down against the table portion 36 and to determine the depth of cutfC' by Chips removed by the knife are stock, the relation between these parts must be changed to facilitate the escape of chips and to hold the leather for clean, accurate cutting. Ac cordingly, provision ha been made for the adthe knife carrier axially of the pin 68 so that it is possible to regulate this spacing.

Hence,the upstanding leg 12 of the supporting bracket is provided with a screw I22 which locked in adjusted position by a check nut I24,

and the end of this screw bears against a depending portion of the knife carrier below its hub 98.

Accordingly, the practice'i to loosen the check nut I24 and to turn the abutment screw till it; contacts the depending part of th knife carrier. "12 may be loosened and: the abutment screw I22 turned inward, forekm ample, (a fraction of a revolution is usually sufii cient), to effect a movement of the hubofi the Then the clamp screw knife carrier along the hub of the holddown ca rier to its desired position. Th clamp screw is then tightened, whereupon th As previously stated, the knife blade figjisfa straight member of triangular cross section uni-f.

On this portion 96 there This hub 98 has a splitportion m nfwer; I22 may be backed off to the position shown in Fig-10 to reduce the friction on the kmre rnek form along its length. The blade is held in the carrier 66 by a clamp member I08 which is attached by a screw I I and is recessed at l2| to avoid contact with theedge 104 of the blade. This clamp member has a sloping lower side I23 (Fig. 3) which engages one lateral face of the blade away from the edge I04 and is angularly related to a surface 125 in'a recess in the holder 66. This surface I25, which also contacts the lower lateral face of the blade away from it edge, and an abutment surface 126, for the back of the blade, positively determine the position of the knife 62 as well as the angl of cut, and it will be noted that the clamp member I08 extends out (Fig. 2) nearly to the end or the knife blade and becomes dull, however, as it necessarily will in the course of use, it is only necessary to loosen the screw H0 and to move the blade longitudinally to bring a sharp edge portion into use, and ultimately to break off the used portion of the blade.

therefore protects it against accidental nicking. When the portion which is chamfering the sole For reasons which will later appear, the knife I carrier has a depending member H2 to which is secured a spring I M the other end of which is,

attached to an eye-bolt l l6 screwed into the lower side of the bracket 74. The lower end of this depending member H2 is widened at I28 (Figs. 3 and 8) to receive both a screw H8 and a screw I20. Of these, the screw H 8 is long enough to bear against a portion of the bracket 74 thereby to determine the idle position of the knife carrier while the screw I20 is adapted to rest against the depending leg 84 of the carrier for the holddown.

By virtue of this arrangement, it is possible,

when soles Of the type mentionedabove having I prefitted heel-seat portions are to be treated, to

lb o sen the clamp bolt H12 so that the knife carrier may turn about the reduced hub portion 96 ofthe holddown carrier independently and then, by properly adjusting the screw H8 to prevent the knife carrier, and hence the knife 62, from dropping far enough toward the sole support 36 so that the skivedheel-seat portion will ever be acted upon by the knife. The screw I20 will be adjusted to leave a slight space between it and the leg at at that time so that the holddown to. will continue to act on the work. On the other hand, when the shank portions are being treated, the

holddown leg 84 will act against screw I20 and hold the knife at a level where it will correctly chamfer these portions and then rise to make a cut C of equal depth in the forepart portion.

In operation, a sole will be presented to the machine and the arm l6 raised to start feeding the sole forward so that its periphery i automatically treated by the chamfering knife which will be guided by the holddown to make a uniform cut 0. At the same time, the bandB of cement of uniform width will be applied. There is little danger of gumming up the machine since only a small portion of the holddown and of the knife lie alongside and close to each other near the work where cement might be picked up. Fur- Having thus described my invention, what I claim as new and desire to secure by Letter Patent of the United States is:

1. In a sole-treating machine of the type having a sole-feeding mechanism, a member having an upright gage surface and also having a holddown surface overlying the upper surface of the work, said member being pivotally supported for movement heightwise of the sole, and a separately pivoted chamfering tool the position of which heightwise of the sole is controlled by said member, said tool being thereby arranged to remove material to a uniform depth irrespective of the thickness of the sole.

2. In a sole-treating machine of the type having a sole-feeding mechanism, a support, an arm having a holddown overlying the upper surfaceof the sole pivotally mounted on said support, said arm having a hub portion extending laterally from said arm, and a knife holder provided with a clamping member surrounding said laterally movement of the carriers, a holddown in one carrier, and a knife in another carrier.

4. In a sole-treating machine, a support, a plurality of carriers independently pivoted on said I support, springs urging said carriers downwardly to idle positions, stop screws between the support and said carriers adjustable therebyindividually to limit the downward movement of the carriers with respect to saidsupport, a holddown in one carrier, a knife in another carrier, and means on the knife carrier spaced from the holddown carrier when said carriers are in idle position and operating to cause the holddown to lift the knife carrier after a predetermined movement of the holddown away from the support. 1

5. In a sole-treating machine of the type having a sole-feedin mechanism, a pivot supported laterally of said feeding mechanism,a holddown member having a hub tiltabie on saidpivot, a chamfering member having a hub also mounted about said pivot, and means for axially adjusting the hub of said chamfering member with respect to the hub of the holddown member.

6. In asole-treating machine of the type hav-' ing a sole-feeding mechanism, a pivot supported laterally of said feeding mechanism, a holddown holddown in one carrier, a knife blade in the other carrier, a stop screw cooperating with the support to determine the extent of movement of the holddown carrier, means on said knife carrier overlapping the holddown carrier so that upward movement of the holddown carrier is communi-. cated to the knife carrier, and an independent stop member cooperating with the support and the knife carrier for limiting the downward movement of the knife carrier irrespective of the movement in that direction of the holddown carrier.

WILBUR L. MAcKENZIE. 

